TRIBE CONCHACEA. 119 



V. HiSTRioNiCA. Brod. Sf Sow. Z. P. 1835. Obovate.pale 

 fulvous with irregular brown interrupted rayed spots and radiating 

 rib-like strias, which are rough, prettily decussated, and usually in 

 pairs ; dorsal edge straightish, anteriorly sub-angu!ated ; lunule 

 large and heart-shaped ; inside whitish. 1 J^. .l-f^. — C. America. 



V. Spurca. Sotv.Z.P. 1835. Ovate, thick, with radiating blotches 

 of brown and fulvous, with subobsolete concentric rib-like striae, 

 which are obtuse, and rather interrupted near the sides, ^q. .l-y^^. 

 — Valparaiso. 



V. C01.TJMBIENSIS. Sow Z.P. 1835 Rounded elliptic, thick, 

 varied with white and ash colour, with radiating ribs, which are 

 numerous, flattened, rounded and twice as large as the interstices : 

 posterior side the shorter, its ribs with decussating short and obtuse 

 scales, the anterior ribs wrinkled, central ribs smoothish ; whitish 

 within. \-^j^. .2\.— W. Columbia. 



V. Tricolor. Brad'. ^ Sow. Z. P. 1835.— Beechey Zool. 

 t.4l.f. 7. Ovate-elliptic, thickish with radiating rib-like decus- 

 sated striae ; with irregular brown interrupted spots disposed in 

 rays ; dorsal edge subaugulated in the middle : lunule small and 

 heart-shaped: inside violet, l^^^. .\^\. — C. America. 



V. Obscura. Brod. Z. P. 1835. Sub-globular, whitish, in- 

 distinctly spotted, rough, with crenulated concentric lines ; inside 

 white. Diam. -^q. — Pacific. 



V. Chilensis. Brod. ^ Sow. Z. P. 1835. Obovate, pale, 

 with radiating rib-like striae which (especially the central) are flat- 

 tened and decussated, particularly at the sides ; adorned with pale 

 brown spots blotches and strigils ; dorsal edge straightish, rather 

 sloping, anteriorly subangulated; posterior side the shorter; lunule 

 small and cordiform; inside whitish. 2f . .2^. Chili. 



* * Inner margin qicite entire. 



V. Lamellata. Lam. 28.— TF. S. t. 2./. \.— Reeve, t. 68./. 3. 

 — Del. t. 10. f. 6. Oval, angulated at the anterior extremity, of 

 which the slope is glabrous, with unequal ribs ; whitish with trans- 

 verse remote ridges which are fringed on their ventral margin, on 

 which side also they are vertically striated, and possess anteriorly 

 canaliculated appendages ; whitish, the lunule oblong heart-shaped 

 and somewhat lamellar. — Variety. Rather depressed, with the 

 ridges narrower and without appendages. 2f . — New Holland. 



V. Exalbida. Chem.f. 1974.— D. p. 170.— Lam. 29. — TF. t. 7. 

 f. 27. — -£". t. 264. y. 1. Oval heart-shaped rather depressed, uni- 

 form chalky white both within and without with transverse elevated 

 rather membranaceous striae : lunule oblong, anterior depression 

 lanceolate. 2\. . 3. — Falkland Isles. 



V. RuFA. La7n. 30. Oval tumid, rufous, with the margin 

 white, transversely grooved, and very finely striated longitudinally ; 



